First of all, I have to say that as a base it was quite stable while I used it, however its plastic material is of very poor quality and did not withstand even a few months of use, as the mechanism that locks the positions to increase and decrease the diameter of the glass broke, making it useless.

I use it on my machine. It is practical for coffee at low speeds (in the city). It doesn't work for water and at higher speeds. Either the water will "disappear" or it will break. I have already broken a base by putting a water bottle and coffee has leaked out.

It could have a narrower adapter on the mirror iron support, as a result, it is not supported and the coffee cup comes off the base

I have it for a year. For its price, it is very good. I have put it on the handlebar of my Vstrom and it responds quite well for its price. Its quality is not the best but it is a satisfactory holder for your drink.

While initially it appeared to have good and quality construction, within a month the mechanism of the base broke (with 1 to 2 times usage per week)

The application with the machine was mediocre to bad because it has 3 different levels for how tight it should be and they are all big, resulting in the mirror not being tight. Also, at the bottom of the mirror with the rubber, it does not tie well. When you connect the case to the neck, it does not click, so you don't know if it is fastened and it doesn't seem to hold well. The worst part is that I received it with a rusty screw. The price is considered reasonable. Regarding the Beverly 300.